Silverleaf Desmodium (Desmodium uncinatum [Syn: Desmodium intortum])

An introduced herb native to the tropical America. Common and naturalized along southeastern hill country roadsides. Probably introduced as a ground cover.

Pearl Flower (Heterocentron subtriplinervium)

An introduced small shrub native to Mexico. Cultivated as a ornamental plant but a potential invader. 

Stinking Cassia (Senna hirsuta [Syn: Cassia hirsuta])

An introduced weed, common in waste places, disturbed vegetations and open places. 

African Lily/Lily-of-the-Nile (Agapanthus africanus)

An introduced large herb native to Southern Africa. Cultivated in the montane region as an ornamental and for cut-flowers.

Montbretia (Crocosmia × crocosmiiflora)

An introduced ornamental herb cultivated at high elevations. Escaped and naturalized in open places, along roadsides, footpaths etc. It is a fertile hybrid between Crocosmia pottsi and Crocosmia aurea both native to Africa.

පේර[Pera]/Guava (Psidium guajava)

An introduced small tree or shrub widely cultivated in home gardens for its edible fruits. Native to tropical America.

Whorled twintip (Stemodia verticillata)

An introduced annual herb native to tropical America. Naturalized in cultivated grounds and roadsides of the hill country. Flowering from July to December.
Flower size - About 0.3 cm across.

Dicliptera japonica [Syn: Peristrophe japonica]

An indigenous (?) prostrate herb grows among grass in light shade of the Northern dry and intermediate regions.

*An addition to the flora of Sri Lanka by J. &J.  de Vlas, 2008
*** With the J. & J. deVlas, 2019 this plant was re-identified as endemic Dicliptera neesii. So that Peristrophe japonica is no longer a plant species occurs in Sri Lanka. 

හිඟුරු පියලි[Hinguru Piyali] (Kaempferia galanga)

An introduced herb native to the India. Cultivated in gardens.

රන්වන් කටු කරඩු[Ranwan Katukarandu] (Barleria lupulina)

An introduced small shrub native to the Mauritius. Cultivated as a hedge plant in home gardens. 

Petiveria alliacea

An introduced small shrub native to the tropical America. Escaped and naturalized along forest edges and hedges as well as the waste grounds around the Kandy (and probably Mathale) . 

බණ්ඩක්කා [Bandakka]/Lady's fingers/Okra(Abelmoschus esculentus)

An introduced annual herb probably native to the Ethiopia. Widely cultivated in gardens and plantations for its edible fruits. 

හණ[Hana]/Hemp/Sunn hemp(Crotalaria juncea)

An introduced annual herb native to the India. Widely cultivated as a cover crop and for fiber. Escaped and naturalized along roads. It was considered as a Data Deficient plant in the 2010 Red List. Old specimens available from Matale, Badulla, Nilgala, Between Habarana & Kanthale, Kalawewa, Kurunegala and from Kegalle district without having exact locations (Flora of Ceylon Vol 7). Recently few plants were observed from a Savannah habitat at Rahathangala ( Jayasinghe H.D., 2015), This record is from a roadside location of newly constructed Kongahawela - Elehara road (B312) near Moragahakanda reservoir . 

Vogel's tephrosia (Tephrosia vogelii)

An introduced large woody herb native to the Africa. Planted for shade in tea plantations and as an ornamental. 

Indigofera spicata

 Common introduced herb occurs mainly in the hill country road sides and weedy places. Sometime introduced in pastures.

Black-eyed Susan (Thunbergia alata)

An introduced climber native to tropical East Africa. Cultivated as an ornamental. An escape from Botanic Gardens and naturalized along roadside embankments, tea plantations etc. Common in moist areas and hill country up to about 1500 m a.s.l. Flowering from August to February.

ඇඹිල්ල[Ambilla]/Indian Mulberry (Morus alba)

An introduced small to medium size tree native to the China. Cultivated in home gardens and may be escaped too. Leaves can be used to feed silk worms.

විල්ලුද ඇපල්[Willudha apple]/Mabole tree/Velvet apple (Diospyros blancoi [Syn: Diospyros discolor])

An introduced tree sometimes cultivated in home gardens as a fruit tree. Mabole tree is native to the Philippine.

කෙසෙල්[Kesel]/Banana/Plantain(Musa x paradisiaca)

An indigenous giant herb, widely cultivated for its edible fruits. Cultivated varieties are hybrids of Musa acuminata (ගල් කෙහෙල්/උනෙල්) and Musa balbisiana (ඇටි කෙහෙල්), both species are native to India, Sri Lanka and Malaysia. 

West Indian rattlebox/Zanzibar rattlepod/Cusara pea (Crotalaria trichotoma[Syn: Crotalaria zanzibarica])

An introduced large herb native to tropical East Africa. Introduced as a green manure or cover crop. Escaped and naturalized along road sides, waste places etc. mainly in the hill country.